Is the DNS server returning the right IP address? If your hostname is showing the correct IP address, but you cannot connect to your device, the next step is to make sure that the hostname is resolving properly. The easiest way to test this is to run an NSLOOKUP command from a Terminal window.
If you can ping the FQDN, look at how DNS devolution is set up the PC. Winsock API which MS ping will automatically use the FQDN of the client PC if append primary and connection specific DNS suffix is checked in TCP/IP advanced DNS settings. How-to Ping IP Address and Check DNS Settings Jun 11, 2012 domain name system - Cannot ping DNS servers - Server Fault
Solved: Can ping IP address but not by domain n - Cisco
windows server 2003 - Can ping IP address and nslookup
If it turns out that the problem is being caused by your ISP’s port block, you have a few options available. In the case of a web server being denied access on port 80, you can use the Port 80 Redirect feature of our Dynamic DNS service. The Port 80 Redirect is available as a part of any of our Dynamic DNS and Managed DNS packages.
An A record shouldn't be required or host file entry if you are using public DNS you may find that you cannot see host names on the internal network however if you have not changed the DNS settings of your machine and either the router or internal dns server is either primary or secondary dns lookup server then you shouldn't run into this issue. May 10, 2012 · Based on your comment I removed the dns entry for the second DNS server (dc2) from the non-domain workstation so now it only see's one DNS server the one in which I am making changes on. I can ping the FQDN of the CNAME now. I am able to resolve the cname from bot dns servers without the FQDN on "DOMAIN" computers only. Aug 28, 2012 · From the laptop, I can ping the router and running ipconfig shows that it obtains the same gateway and dns as the PC and the next available IP - 1218.104.22.168. So this leads me to believe the following: 1- The router, NIC and cat 5 ethernet cable are working fine at the hardware level. 2- The DNS settings in the router are fine, as the laptop works Oct 31, 2018 · If the device you cannot connect to has a DHCP address, assign it a static IP, Subnet and DNS Reboot both the PC and the device to clear any routing issues or crashed services If all else fails, the problem may be in a network switch between the PC and the failing device so manually clearing the ARP table on that switch (or switches) or just